in the us and germany, there are even laws in place requiring refiners to blend renewable fuels into the gas supply. the aim is to ease global dependency on oil and protect the environment. increasingly, farmers are therefore growing crops for fuel rather than food -- because it's more lucrative. this development is particularly acute in the us. almost 40% of the corn harvest is used for fuel. 37% becomes animal feed. that leaves just 11% for food, while 13% is exported. the german world hunger organization is alarmed. >> obviously demand for biofuel -- which has political support -- is one of the main causes of the shortage of agricultural goods. more than 8% of the world grain production is used to make bio ethanol. it puts the agricultural sector under enormous pressure and leads to price hikes. >> poor countries are especially hard hit. because they lack their own resources, they are forced to import grain. but prices are increasingly prohibitive. >> for people living off the equivalent of one euro a day and spending 50 to 60 cents on food staples, the inevitable result is hunger